1. Birth Place Lab, Division of Midwifery, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada.
2. Bastyr University Department of Midwifery, Kenmore, Washington, USA.
3. SUNY Old Westbury, Old Westbury, New York, USA.
4. National Association of Certified Professional Midwives, Keene, New Hampshire, USA.
5. Rtory Meyers College of Nursing, New York University, New York, New York, USA.